Adjustable concrete-form.



Patente-d Nov. 8, 1910.

1 SHEETS-GEES! 1.

R. B. HIGG1Ns.& H. ALBERS.

ADJUSTABLE CONCRETE FORM.

y APPLICATION FILED FEB. 25, 1910'.

1N VEN T ORS.v Rober! B. .Herm an A f'/A rToNE Y.

1n: Norms risks co., wnsumanm. l:A c.

INVLNTORS Yagms q Herman /Z ens .A TTORNE Y 4 SHEBTS-SHEET 2.

Patented Nov. 8, 19M).

ADJUSTABLE CONCRETE FORM. APPLCATION FILED PEB. 25, 1910.

R. B. HIGGINS sa H. ALBBRS.

- WITNESSEIS.'

R. B. HGCTNS L H. ALBERSV ADJUSTABLE CONCRETE FOR-M.

APPLIcmTmN FILED 1113.25, 1910. a

'Ptented Nov. 8, 19410.

4 SHABETSr-SHEET 3.

RVB. HIGGINS-a H. ALBERS.

ADJUSTABLE GONURETB FORM.l

APPLICATION FILM) 213.25, 1910.

Patented Nov. 8, 1910.

4 SHEETS-SHEET 4.

1x VEN 193s'. @oberz *5. fzgmsy v Herman A! ens.

A TTORJYE Y.

WITNESSES:

rus Noni: Puri: co., vnnmmau, n. c.

RuG-BERT B. HIGGINS AND HEBMAN ALBEBB, OF ST. LOUIS, MISSOURI.

AnJUs'rnnnE CONCRETE-roma.

Specication of Letters Patent.

Patented NOV. 8, 1910.

Application ied Bebruary 25, 1910. Serial No, 545,983.

had to the accompanying drawings, forming a part hereof.

Our invention has relation to improvements in adjustable and knock-down forms for concrete structures, being especially designed for use in the construction of concrete columns, beams and floors of buildings, and it consists in the novel features of construction inore fully set forth in the specilication and pointed out n the claims.

In the drawings, Fi re 1 is a side elevation of the invention; ig. 2 is a top plan of Fig. 1, the view showing the main or center frame work for the support of the oor form, the beam-forms on two contiguous sides (only) of such center form, and the column form on one ofV the corners (only),

the like construction not shown) prevailing' about the two remaining sides; Fxgn is un end elevation of the structure showing sections of the concrete oor,beam and column; Fig. 4 is a vertical transverse section on the line 1 4 of Fig. 1, showing sections oi the concrete floor and beam, which are merebT dotted in Fig. 1; Fig. 5 is a detail top plan of the column form and corner posts, and adjustable frame for supporting the column; 6 is n cross-section on the line G-G of 5; Fig. 'A' is a perspective detail of n pen of crossed tie-bars by which the posts are braced; F '05. 8 and S) are perspectives of the two zes o clipsl for supporting the ndjustable frames which carry und guide coiumn forms; Fig. 10 is a perspective of one of the hangers supporting the decking which constitutes the beamform; Fic. ll a crosssectional detail taken through a floor juist too close to the Wall of an adjoining building to permit of the placing of the regular outer joist from which the regular hanger is supported, the view showing the manner of supporting the beam-form from beow, under the circumstances; und Figs. t2 and 13, 14 and 15, are respectively end views und side elevations of two modified constructions for clamping together the extensible sections or members of the supporting posts.

The object. of the present improvement is to provide a form which shall be adjustable bot 1 vertically and horizontallv; one which will allow for an accurate independent udjustment of the molds or forms receiving the concrete for the vertical supporting columns of the building; one providul with hangers capable of rigid suspension against lateral displacement for the support of the deck ing on which the horizontal concrete door beams are to be cast; one provided with extensible members lia-ving flat contacting faces, entering into the construction of the vertical posts or columns which support the column molds= and that of the-horizontal main and secondary joists re ectively supporting the decking on whic are formed the horizontal beams and concrete floor; one permitting the construction of a concrete beam or joist close to the wall of un adjoining building; one which shall be rigid when once assembled; one in which the adjustable members entering into the construction of the posts und josts may assume the form of either an angle-bar, channel-bar, {iatbar or even a box girder (an angle-bar being herein used as an illustration) one susceptible of a. variety of changes without altering its mode of operation; one which will be practically devoid of vibration during the setting operation of the concrete; and one possessing further and other advantages better apparent from :1 detailed description of the invention which is as follows Referring to the drawings, and for the present to Figs. 1 to 11 inclusive, P reprents a series of inner posts made pref erably of two angle-bar sections overln ping along their respective legs, and mtl e extensible by means of a slot s in the leg of one of the sections and a clamping nutbolt- Z) carried by the contacting leg of the other section. Of course, the slot s need not be continuous as shown, und a series of short interrupted slots or holes may be substituted therefor.l und in fact, (as subsequently to be referred to) any mechanical means for making the posts extensible muy be resorted to. One of the legs of the angle-bar has its upper end turned into an inwardly deflected horizontal supporting bracket or ledge 1, (Fig. 4) said ledges serving to support the ends of the angle-bnr floor josts J, one ledge supporting one end tudinul Juist, the opposite end oi the trans- -versc jolst 1n turn resting on the end of the v': longitudinal joist supported by the ledge, und

the end of the transverse joist directliy supported on the ledge 1 in turn carrying the adjacent end of the longitudinal joist (Fig. 2) i 5 (only one illustrated) likewise composed of extensible angle-bar sections. Over the several joists J. J', are placed sheets 3 preferably flanged nt their outer cornetedges, the flanges n. bearing against the vertical legs of the joiets, which legs t'orm the bounding walls of the flooring formed by the superosition of the tloor plates or decking he posts nre suitnhly braced on the sides of the frame by double or cross tie-bars 4 composed of extensible sections whose outer ends are. secured to the posts by pins or screws 5, the overlapped portions of the scctions beiner fastened by screws (i carried by clips T embracing the overlapped portions; 'i similar clip 'T and screw G is placed at the intersection of the cross-bers (Figs. l, At the ends of the frame the posts are braced by similar single extensible tiebars 4.

Dis osd around the sides of the structure thus ormed (only two sides being herein illustrated) and opposite the posts P, und spaced a suitable distance therefrom, are outer posts P" likewise composed of extensible angle-bar sections similarly con structed and similarly braced.I each pair of outer posts P' likewise and in like manner supporting an extensible outer joist J, disposed parallel to the adjacent joist of the inner frame. The outer series of posts are likewise braced where necessary by tie-bars 4. At the intersection of the vertical planes of disposition of the outer series of posts P on two contiguous sides of the structure thus formed. is a corner post P likewise made of extensible englobar sections. so that a cluster or group of tour posts are disposed at the corners of the structure (onlir one corner being hcrevillustrnted') said cluster serving as the means for supporting the form in which the vertical concrete column is cast, as subsequently explained. It will be seen that the outer pair of juifats J, J". are so mounted :is to brinil their vertical 50 legs or walls in parallel and contiguous relation, the horizontal leg;r of the outer joist J pointin outward, and the corresponding legl of the inner joist J [hunting inward (Fig. 4). This leaves the since between the vertical legs clear for t c suspension of the of the transverse juist, whereas the lcdgeof 'the next post supports the end of the lougli.

hangers which carry the decking or beaunforni. lhesc hangers are composed of pairs of lint, twisted vertical suspension bnrs S, terminating ut the top in hooks It which engage the upper edges of the joists, the medial portions of the bi1-rs heilig pivotally connected by n link 9 one end of which pro jects a suitable distance beyond the adjacent suspension bar. The lower portions of thc bars and the extension of the link are provided with openings o for the reception of the deflected terminals of a brace-rod 10 which serves to keep the hanger rigid. In practice the hangers are suspended so that the braced ends shall point alternately in opposite directions (Figs. 1, 4). This insures a rigid bracing not only for the hangers, but also against lateml yielding of the joists. The links il of the hangers colleetively serve to support the sheet un le-plates ll which are placed in lapped re ation on the hangers between the joists, and thus serve to form a. mold or form for the concrete beam B, cast therein.

As stated above, the cluster of corner posts P, P', P', P, serve to support the form for the concrete column C. This form is composed of a series of sheet angle-bats 12 placed in lapped relation (Figs. 2, the several sheets airing hooks or bent lips 13 formed at their upper ends, said hooks engaging the sides or members of an u per four-sided jointed frame composed ofi sor bars 14, the outer ends of the several members extending beyond their points of connection and hugging the vertical walls of the outer series of posts P', P', P (Fi s. E2. 5). Two of these frames are eneray ample to support a column-form, t 1e lower frame encompassing mich column at a convenient point near the bottoni thereof (F ig. 1). In order to properly center the columnforinrelatively to the center line of the beam column B it is desirable to have some means for accurately adjusting the frames 14,. This is accomplished as follows Engaging thelegs of, the 4outer or exposed pair of angle-bnr posts P, P' (Figs. 2, 5) nre U-shaped clips 15,the longer arm of the clip having a projecting pin 16 which is' inserted through an opening o formed in the extensions of the bars 14. At the bend of the clip is an adjusting screw 17 which beurs against.- the edge of the leeF of the angle-bar of the post, so that when die. screw is turned in proper direction it will draw or exert u pull on the frame l-l thereby shifting it horizontally to bring its center in ulineluentwith the central line of the boum-forni. The legs of the inner pair of posts P, I are engaged b v clips 15 ofsiinilar desi fn except that the long urin is considcrab y longer than the long :um of the clip 15. to permit. the pin 1G thereof to reach -thc hole o of the sinne bur lfl. Of course in screwing up the screws 1T of one pair of clips, the screws 17 of the opposite air must be correspond ingly loosened toA a low for the proper ladjustment or centering of the frames 14. `It may be stated in passing that the holes o 1n the extension of the several bars 14 perform the additional function of permitting the enlarging or contracting cording to the cross-section of column to be cast- In practice the concrete forming the floor F is poured on the form formed by the sheet decking 3, when the concrete beam B is poured into the beam-form or mold made by the an le platos 1l (Fig. 3), the column C- haring een at the same time built up to a corresponding level, so that the column, beams, and floor all'inerge together.

W here the wall lV of an adjoining bullding does not admit the erection of the outer posts P', P', and their joist- J", resort 1s had to the following arrangement for supportin tbe beam torni, special reference being iiad to Fig. 11. A In that event bars 8' are hooked over the joist J, each bar 8 havin a second bar 8" h' ed thereto, and provi ed with a. downwar ly turned terminal hook bearing against tbe `wall W. Behind the hooks h is inserted the edge of the horizontal leg of a sheet angle-plate 11' which at intervals is propped up by posts of englobar or similar construction P"- On top of the platos 11 the usual beam form plates 11 are placed when the concrete beam B may be poured into the form close to the wall W.

Of course, the slot and screw connection is not the only available method of securing the extensible sections of the posts or joists; any equivalent means may be resorted to. For example, in Figs. 12 and 13, we show two post sections P clamped by a strap 18 drawn together by a rod 19; in Figs. 14 and 15 we show a stra-p 18 with screw-threaded terminals held together by a tie-bar 19 held in position by nuts :riv passed over the screwthreaded ends of the strap.

The object of employing angle-bars or their equivalents snc] as channel bars, box girders, flat bars) for the extensible members of the posts and joists, as against pipe or tubular sections. is that the flat engaging faces of such angle-bars (or their equivalents) prevent rotation of the section about the axis ot' the postor joist, an objection inherent with the use of tubular or hollow cylindrical sections or piping. Besides, the flat faces of the angle-bar prent enlarged bearing surfaces to the hangers 8. thereby minimizing the danger of lateral oscillation or displacement of said hangers. Referring particularly to Fig. 10 it will be noticed that Athe link 9 being provided with a bottom -notch d engaging n pin c on the vertical bar 8, the hanger may be instantly removed of the frame :1c-

from the joists, by simply pulling ont one end of the brace 10, when the entire hanger can be folded or collapsed.

Where the supporting led es 1 bent. from one of the angle-bar legs oft e posts ha )pen to be on the outside of the structure "lgs 1, 2, 3, 4) then in lieu of the securing screws 2, we prefer to employ securing means for holding the joists, in the form of clips 7 provided with screws b.

Having described our invention, what we claim is:

l. In combination with an inner series of extensible posts, extensible joists mounted on the same, lapping sheets supported on the joists and forming a floor form, an outer series of extensible posts spaced apart from the inner series, extensible joist-s connecting the outer series of posts and disposed in the general direction of the adjacent joists supported by the inner series of posts,hangers suspended between each outer joist and inner joist contiguous thereto, and a decking supported on the hangers and forming n beam form.

2. In combination with an inner series of extensible pts, extensible joists mounted ou the same, lapping sheets supported on the joists and forming a door form, an outer series o f extensible posts spaced apart from the inner series, extensible joists connecting the outer posts and disposed in the general direction of the adjacent joists su ported by the inner series of posts, means or supporting a beam-form decking between the outer joists and joists contiguous thereto, and column-forms supported y the posts at the convergence of two contiguous beamforms.

3. In combination with an inner series of extensible posts, extensible joists mounted on the same, lapping sheets supported on the joists and forming a door form, an outer series of extensible posts spaced apart from the inner series, ettensible joists connecting the outer posts and disposed parallel to the adjacent joists supported by the inner posts, means for supporting a beam-form decking between the outer joists and inner joists contiguous thereto` column-forms supported by the peosts at the convergence of two contiguous am forms, and means for adjusting the column-forms relatively to the center line of the beamforms.

4. In combination with a pair of parallel joists having vertical flat members. spaced a suitable distance apart, a series of hangers comprising each a pair of vertical terminally hooked bars supported from the top edges of the members of the respective joists, a cross-bar pivotally connecting the vertical members at points below the lower edges of the joists and having one end extending beyond the vertical bar, a brace coupling the end of the extension to the adjacent vertical bar, the hangers heilig disposed yvitli. the braces pointing alternately in opposite directions.

5. In combination with a group of posts disposed about u fixed point, open frames dis osed along said posts, and column-forms liel in position by said frames between the osts.

p 6. In. combination with a group of joistsupporting posts disposed about a fixed point, open frames dis osed along the post s, and column-forms hel in position by said frames between tlie posts. 0

7. In combination with a group of Juist" supporting osts disposed about a fixed point, open nies mounted along and between the posts, vertical lapping plates in serted into the forms and ormn columnforms, and means for adjusting tq e frames and the form supported thereby, 1n a lionzontaiplane.

8. In combination with an inner series of posts composed of extensible angle-bar Sections, longitudinal and transverse main joists composed of extensible angle-bar sections carried by the posts, extensible supple mental joists supported by the horizontal legs of the main joists, lapping plates resting on the joists and forming a. floor-forni, an outer series of corresponding posts surmounting j oists spaced apart from the inner soi-ics and disposed in planes parallel to the joisls of the inner series, hangers supported from the outer serios of joists and tlie con tiguous joists of tlie inner series, lappin angle-plates supported on the hangers an forming beam-forms, an outei` extensible ooi-ner post disposed at the convergence of the vertical planes of two contiguous sides of the structure thus formed, open-frames mounted between the group of -posts clustered about said corner, lapping plates iiiserted into said frames and forming columnforms at the point of convergence of two contiguous beam-forms.

9. In combination with a joist located in proximity to an adjoining wall, a han er iaving a. member suspended from the joist, a second horizontal member terminating in a liook adj aoent to the wall, a plate disposed horizontally and having an edge engaged by said hook, posts for propping u said plate, and suitable decking resting on e plate and hangers and formin a beam-forni adjacent to the Wall afoiesai In testimony whereof we aix our signa tures, in presence of two witnesses.

ROBERT B. HIGGINS. HERMAN ALBERS.

"Witnsses :q

MIL t TREK, Jos. A. MICHEL. 

